python-subprocess32: needs kernel headers v3.10 on MIPS N64

MIPS N64 ABI has been missing getdents64 wire up until kernel version
3.10. Make python-subprocess32 depend on newer headers for MIPS N64.

Fixes:
http://autobuild.buildroot.net/results/af1/af1c0dbfcc27fa93992de57f986657d65163800e/
http://autobuild.buildroot.net/results/e5f/e5f9e96d02512359348886a9db3aa4cea9db2081/
http://autobuild.buildroot.net/results/8ba/8ba4c75d724b45c4fe10b4b6c90602b68a811fac/

Cc: Asaf Kahlon <asafka7@gmail.com>
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/python-subprocess32/Config.in

@@ -1,8 +1,13 @@
 config BR2_PACKAGE_PYTHON_SUBPROCESS32
 	bool "python-subprocess32"
 	depends on BR2_PACKAGE_PYTHON
+	depends on BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_10 || !BR2_MIPS_NABI64
 	help
 	  A backport of the Python 3 subprocess module for use
 	  on Python 2.
 
 	  https://github.com/google/python-subprocess32
+
+comment "python-subprocess32 needs a toolchain w/ headers >= 3.10 on MIPS N64"
+	depends on BR2_MIPS_NABI64
+	depends on !BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_10